document.write( "Question 180120: The value of cos 3pi, where 3pi is radian measure , is \n" ); document.write( "
Algebra.Com's Answer #134986 by jim_thompson5910(35256)\"\" \"About 
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\"cos%283pi%29=cos%28pi%29=-1\"\r
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\n" ); document.write( "\n" ); document.write( "Note: The angle \"3pi\" radians is a coterminal angle to the \"pi\" radians. Also, use the unit circle if you aren't familiar with trig functions.
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